Wanted a water bottle that was a little lighter for backpack. This is a great size. Only wish it had a covering over the drinking hole.Love these bottles. Only ones I buy for my kids. It really is spill proof. I only allow water in it just incase. But very easy to clean. ?I am a big fan of Contigo bottles, as a family we have loads of them. This one however seems to have a design fault. The plunger keeping the liquid inside doesn't return to seal the bottle. I found this out when we arrived at one of the kids martial arts lessons and the footwell of the car was full of the contents of the bottle. It had leaked everywhere. Contigo are good, just not this style of bottle.I buy these every time anyone needs a new water bottle (which isn’t often as these last for ages!). The children take them to school and we’ve never had a leak. The button pressing is also very satisfying! Good size, hard wearing and easy to just put in the dishwasher.This is a repurchase for me, I had one of these for the last 2 years and the button finally went on it after daily use. This is the best bottle I've owned so it was a no brainer to get another. It stays sealed, the bottom is rubber so it doesn't tip, the button just works and it's easy to clean.Good quality waterbottle. We have a 5 year old who play with waterbottle and end up breaking it every 2-4 week. The annoying part is every other bottle we purchased had an extra cover or some other straw options etc. And when bottle fall from his hand most of the time the lid or rubber washer or some small thing will break. but with out that bottle will leak. This bottle does not have any extra fitting, and the bottle itself is very sturdy and it does not have that plastic feel. Over all we are happy with this purchase